Home / 21,153.63-31,731.26-6,364.65

Finding the Fourth Proportional to 21,153.63, 31,731.26 and 6,364.65

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Solution

The fourth proportional to 21,153.63, 31,731.26 and 6,364.65 is: 9,547.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.63 : 31,731.26 = 6,364.65 : x
  2. Step 2: Convert to fraction form
    21,153.63/31,731.26 = 6,364.65/x
  3. Step 3: Cross multiply
    21,153.63x = 31,731.26 × 6,364.65
  4. Step 4: Simplify right side
    21,153.63x = 201,958,332.14
  5. Step 5: Solve for x
    x = 201,958,332.14/21,153.63
  6. Step 6: Final answer
    x = 9,547.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.